package com.meow_woof.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.meow_woof.constant.MessageConstant;
import com.meow_woof.constant.PasswordConstant;
import com.meow_woof.constant.StatusConstant;
import com.meow_woof.dto.EmployeeDTO;
import com.meow_woof.dto.EmployeeLoginDTO;
import com.meow_woof.dto.EmployeePageQueryDTO;
import com.meow_woof.entity.Employee;
import com.meow_woof.exception.AccountLockedException;
import com.meow_woof.exception.AccountNotFoundException;
import com.meow_woof.exception.PasswordErrorException;
import com.meow_woof.mapper.EmployeeMapper;
import com.meow_woof.result.PageResult;
import com.meow_woof.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }


        //把前端送过来的密码进行md5加密
        //密码比对
        password= DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }
    /**
     * 新增员工
     * @param employeeDTO
     */
    @Override
    public void save(EmployeeDTO employeeDTO) {
        Employee employee =new Employee();
        //对象属性拷贝
        BeanUtils.copyProperties(employeeDTO,employee);
        //设置账号的状态，默认正常状态 1表示正常，0表示锁定
        employee.setStatus(StatusConstant.ENABLE);
        //设置密码，默认密码123456，要用md5加密后，再存入数据库
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
      /*  设置当前记录的创建时间和修改时间
        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());
        设置当前记录创建人id和修改人id

        employee.setCreateUser(BaseContext.getCurrentId());
        employee.setUpdateUser(BaseContext.getCurrentId());

       */
        employeeMapper.insert(employee);


    }

    /**
     * 员工分页查询
     * @param employeePageQueryDTO
     * @return
     */

    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        //select * from employee limit 0，10
        //开始分页查询
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());
        Page<Employee> page=employeeMapper.pageQuery(employeePageQueryDTO);
       long total=page.getTotal();
       List<Employee> records=page.getResult();

        return new PageResult(total,records);
    }

    /**
     * 启用、禁用员工账号
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        //update employee set status=?where id=?
        Employee employee = Employee.builder()
                .status(status)
                .id(id)
                .build();
        employeeMapper.update(employee);

    }

    /**
     * 根据id查询员工
     * @param id
     * @return
     */
    @Override
    public Employee getById(Long id) {
        Employee employee=employeeMapper.getById(id);
        employee.setPassword("******");
        return employee;
    }

    /**
     * 编辑员工信息
     * @param employeeDTO
     * @return
     */
    @Override
    public void update(EmployeeDTO employeeDTO) {
        Employee employee =new Employee();
        //对象属性拷贝
        BeanUtils.copyProperties(employeeDTO,employee);
/*       设置当前记录的修改人和修改时间
        employee.setUpdateUser(BaseContext.getCurrentId());
        employee.setUpdateTime(LocalDateTime.now());*/
        employeeMapper.update(employee);
    }
}
